Students Beyond War & Catholic Peace Ministry said the delivery is a reminder to the candidates for being "naughty and not nice."

The group said they stopped at Mitt Romney, Barack Obama, Michele Bachmann and Newt Gingrich's offices in the Des Moines area.

The group handed office workers a statement with the coal: "On behalf of Students Beyond War and Catholic Peace Ministry, we have brought you Santa Claus and 'lumps of coal' in the Christmas tradition for neglecting the least among us, for promoting perpetual war, for worshiping militarism -- the opposite of the baby Jesus in the manger called the Prince of Peace."